package lianxi3;

import java.util.ArrayList;
import java.util.Arrays;
import java.util.Comparator;
import java.util.List;

public class FileringApples {

	public static void main(String[] args) {
		Runnable r=() ->System.out.println("Hello");
		r.run();
		
		List<Apple> inventory=Arrays.asList(new Apple(80,"green"),new Apple(155, "green"),
				new Apple(120,"red"));
		
		List<Apple> greenApples=filter(inventory,(Apple a)-> "green".equals(a.getColor()));
		
		System.out.println(greenApples);
		
		Comparator<Apple> c=(Apple a1,Apple a2)->a1.getWeight().compareTo(a2.getWeight());
		inventory.sort(c);
		System.out.println(inventory);
		
	}
	
	
	
	public static List<Apple> filter(List<Apple> inventory,ApplePredicate p){
		List<Apple> result=new ArrayList<>();
		for(Apple apple : inventory){
			if(p.test(apple)){
				result.add(apple);
			}
		}
		return result;
	}
	
	
    interface ApplePredicate{
    	public boolean test(Apple a);
    }
	
	
	public static class Apple {
	    private int weight = 0;
	    private String color = "";

	    public Apple(int weight, String color){
	        this.weight = weight;
	        this.color = color;
	    }

	    public Integer getWeight() {
	        return weight;
	    }

	    public void setWeight(Integer weight) {
	        this.weight = weight;
	    }

	    public String getColor() {
	        return color;
	    }

	    public void setColor(String color) {
	        this.color = color;
	    }

	    public String toString() {
	        return "Apple{" +
	               "color='" + color + '\'' +
	               ", weight=" + weight +
	               '}';
	    }
	}
	
}
